The past tense of beat the daylights out of is also beat the daylights out of.
The third-person singular simple present indicative form of beat the daylights out of is beats the daylights out of.
The present participle of beat the daylights out of is beating the daylights out of.
The past participle of beat the daylights out of is beaten the daylights out of or beat the daylights out of.